Merge pull request #187671 from Clare-Zheng82/0207-Add_a_note_to_CosmosDB_connector_doc

Add a Note to Cosmos DB connector doc

Author: PRMerger19

articles/data-factory/connector-azure-cosmos-db.md

@@ -8,7 +8,7 @@ ms.service: data-factory
 ms.subservice: data-movement
 ms.topic: conceptual
 ms.custom: synapse
-ms.date: 12/28/2021
+ms.date: 02/07/2022
 ---
 
 # Copy and transform data in Azure Cosmos DB (SQL API) by using Azure Data Factory
@@ -458,6 +458,9 @@ To copy data from Azure Cosmos DB to tabular sink or reversed, refer to [schema
 
 When transforming data in mapping data flow, you can read and write to collections in Cosmos DB. For more information, see the [source transformation](data-flow-source.md) and [sink transformation](data-flow-sink.md) in mapping data flows.
 
+> [!Note]
+> The Azure Cosmos DB serverless is not supported in mapping data flow.
+
 ### Source transformation
 
 Settings specific to Azure Cosmos DB are available in the **Source Options** tab of the source transformation.